Question about JBL GTO75.4 Car Audio Amplifier

3 Answers

Amp cutting out, intermittent fault

My gto75.4 keeps cutting out.The blue LED flashes but as it flashes the red LED dims. (like flashing alternatively but not)
When i measure the voltage it goes from 12.5v down to 8 then up again & down again & up again keeps alternating.Like the amp is in constant reset.there is a little popping noise from the speakers aswel.
Any thoughts
I have checked the battery & alternator & they are fine????????
Please help as i'm gonna have to buy another one...

Posted by on

  • hardcorefish Dec 05, 2007

    The wiring is fine as i've had the amp running really well for a few weeks with no probs what so ever.

    Just suddenly started cutting out this evening & I can't get anything out of it now.

    But i bought it 2nd hand so don't know it's history.

    Any more thoughts

  • Anonymous Dec 08, 2007

    im having some what of a similar problem. but its a different amp.. but when i turn the volume, pre-amps up and turn the loud on, amp will cut off, then on for a split second and back off and eventually nothing will play, but if i turn the volume down it will play fine. i know that the gauge wiring is more than likely too small as im pushing a 1200 watt amp with an 8 ga. wire and an 80 amp fuse. so if its true and im not getting the power to the amp when its needed then i would need bigger wire, but i have something else to add in question. would a cap.(digital output capacitor) be something that would help this problem as well?

×

Ad

3 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I suggest using a 4 gauge or smaller i had the same problem. i switched from 8 to 4 and no problems!

Posted on Sep 29, 2008

Ad

Perhaps you have a ground loop problem. Try using a audio isolation transformer. I had this problem on my home stereo system where my powered sub woofer and amplifier were creating a ground loop.

Posted on Aug 27, 2008

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 57 Answers

What guage of wire are you using to feed ur amp power? maybe its not getting enough power that's why its behaving like that,it sound like the power is breaking down when called for.

Posted on Dec 05, 2007

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Aqualisa showers led fault codes on temp control


Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://homenol.blogspot.com/
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.

Dec 28, 2017 | Home

1 Answer

To wont turn on. Blue and red light keep flashing.


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electronicshelponline.blogspot.com/
If blinks continue without any pause, the main board is faulty.
Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Oct 05, 2016 | Hitachi Televison & Video

1 Answer

How do I fix Samsung ue40h5030ak led tv that the screen is flashing red green blue white


LCD panel fault. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Sep 26, 2016 | Samsung Televison & Video

1 Answer

Why doesn't it turn on?


These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.
http://electro-medical.blogspot.com/

Feb 06, 2016 | Hitachi LE42S704 42 LCD TV

1 Answer

Wont turn on


Two ways to approach this--the red should be on all the time---as for the others you have to look to see which goes out first or last---each is connected to a voltage source--a primitive self check.

Voltage checks usually don't reveal much==the voltages will come up and go down instantly.

If that red is dim and flashing it is at the input of the primary part of the power supply

Jun 12, 2012 | Hitachi Televison & Video

1 Answer

Bluetooth wont charge or power on. when charging the red light comes on. once disconnected from charger it wont come on


Indicator Lights:
1.Headset Status Headset Indicator Light
2.Powering on Steady blue, then intermittent flashes
(changes to standby mode)
3.Powering off Red appears and goes off
4.Standby Blue intermittent flashes
5.Charging battery Red solid light. Light indicator turns off when
battery is fully charged and headset is off.
6.Low battery Triple red flashes
7.Pairing mode Blue/red alternating flashes
8.Missed call Purple flashes. Press the call control button
to cancel flashing light.
9.Incoming call Triple blue flashes when ringing.
Power on and off:
1.Turn on the headset Press and hold the call control button until the
indicator glows blue. You will hear ascending
tones.
2.Turn off the headset Press and hold the call control button until the
indicator glows red. You will hear descending
tones. When power is off, indicator stays off.
If none of this is helpful then it may be that your battery is dead, if that is the case then you will need to replace the whole headset. The battery's are not replaceable.

Good luck from Headsets Direct!

Sep 21, 2011 | Plantronics Explorer 220 Bluetooth Headset...

1 Answer

Monitor goes to standby mode intermittent.


make sure the video cable is inserted firmly. is it is, the video cable wires are loose inside the monitor which it is not getting the signal, telling it to go on standby mode.

Jun 12, 2008 | LaCie Electron III 22" CRT Monitor

1 Answer

Free Pulse


The following procedure will re-establish the communication link between the Headphones and the Wireless adapter, this is called "pairing". Before you start please make sure both the headphones and the wireless adapter are fully charged and turned off.
Note: The headphones and the wireless adapter come pre-paired from the factory.
1. Press and hold the power button on the headphones. See Figure 1.
headphone.jpg
Figure 1

2. Continue to hold the button down until the LED starts flashing red/blue in an alternating pattern. Release the button when the LED starts flashing red/blue. See Figure 2.
headphone-flash.gif
Figure 2
3. Once the headphones LED is flashing red/blue, press and hold the power button on the wireless adapter. See Figure 3.
receiver.jpg
Figure 3
4. Hold down the button until the LED starts flashing red/blue in an alternating patter. The LED will blink blue, then turn off for a few seconds then blink red/blue. Release the button when the LED starts flashing red/blue. See Figure 4.
receiver-flash.gif
Figure 4
5. Once both the headphones LED and the adapter LED is blinking red/blue, press the volume up button once on the headphones. See Figure 5.
headphone-volumeup.jpg
Figure 5
Once the headphones is paired with the adapter, the LED on the headphones will blink blue once every two seconds. See Figure 6.
headphone-flash2.gif
Figure 6
When the adapter is paired the LED will be solid blue. See Figure 7.
receiversolid.jpg
Figure 7
The adapter may continue to blink red/blue for a few seconds even after the headphones LED starting blinking blue. This is normal; the adapter may take a few additional seconds before the LED turn solid blue.
Once the headphones and the adapter are paired, it is not necessary to pair them again even if the batteries on both units are completely drained.
Additional Note: Repeated pairing will not improve the sound quality or give the headphones and the adapter a cleaner connection.

Mar 11, 2008 | Logitech FreePulse Wireless Consumer...

1 Answer

Cutting out intermittent problem


If the voltage is dropping to 8v, it sounds like there is a problem with either the B+ line or the ground connection. You should also check the voltage across the battery terminals to see if the voltage is dropping at the source.

The amp may be going into protect mode. Disconnect all speaker wires from the amplifier's terminals. Also disconnect the RCA cables from the amp. Does it still go into protect?

Insert a 20 amp fuse in the B+ line and try to power it up. If the fuse blows with no speakers connected to it, the amp probably has a blown channel.

Dec 05, 2007 | JBL GTO75.4 Car Audio Amplifier

2 Answers

Help with kogi F9AH screen


Intermittently displays bright red/green/blue raster then shuts down with led flashing 2, 4 or 5 times
Amazingly this was due to the CRT being faulty !

Blank raster
Replace defective TDA6111Q for Red, Blue and green

Red or Green or Blue screen
Check and replace on crt module : D702, D703, D704 (all 1N4148) replace with type 1N4948T

Dead, led flashing red/green at first, then going to red standby
Replace C604 (1000uF, 16v) elec. cap. It is in the decoupling circuit for the 5 volt supply

Nov 23, 2007 | GVision F9AH-TG Television

Not finding what you are looking for?
JBL GTO75.4 Car Audio Amplifier Logo

947 people viewed this question

Ask a Question

Usually answered in minutes!

Top JBL Car Audio & Video Experts

hoyzee1

Level 2 Expert

150 Answers

Rob Beech

Level 2 Expert

61 Answers

Mark Skinner

Level 2 Expert

77 Answers

Are you a JBL Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...